My best friend was between apartments and needed a place to stay. I recently had a bad experience with letting a friend crash at my place (they way overstayed their welcome), so I explicitly pointed out to my friend that I'd be happy to have him stay over, but only for two weeks.

Flash forward to a month later, he's still there and wasn't looking for somewhere else to go. All of his belongings were in my living room, stacked to the ceiling, and he sat around all day smoking dope while I worked a job that I hated to pay rent.

I dropped hints after the two weeks, but finally after a full month, I told him he needed to go somewhere else. He totally disregarded the conversation we had about the two weeks, and just made me seem like an irrational asshole. It turned into a full argument and he found somewhere else to crash for the rest of the month. He took some low blows at me during this argument - attacking my career, my personal life, basically everything I'd opened up to him about during our friendship. He wanted to hurt me.

After he was gone, he left all of his belongings in his place for a month and a half, and stopped talking to me. I told him it's pretty shitty that he would go against what we had discussed and just abuse our friendship to have a place to stay for free. He said he was originally going to pay me, but now I could forget it.

He never paid me a dime. Eventually after 1.5 months, he came with a truck to take his shit. He never said thanks for letting him stay, just gave me a sour look like I was doing him wrong. He talked shit about me to our mutual friends for months.

Saw him months later, and he tried to say "Hey man what's up" like nothing happened between us. During the whole ordeal, he never apologized or even acknowledged that he was doing anything wrong.